All data are in degrees Fahrenheit

en
United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Holyhead now

49.9

°F

April 21, 06:12

Trend:

increasing

Yesterday:

49.7°F

Tomorrow:

50.1°F

Sunrise:

06:07

Sunset:

20:29

Day Length:

14 h. 22 min.

Holyhead in April

Minimum:

47.9°F

Average:

49.3°F

Maximum:

50.9°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 49.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.2°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 49.9°F on 2024, while the historical minimum was 46.7°F on 2018.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 50.2°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Holyhead

Date Current Year

actual* / forecast**

 last year 10 years average
Apr 7 48.1°F 49.1°F 47.6°F
Apr 8 48.0°F 49.3°F 47.7°F
Apr 9 47.6°F 49.6°F 47.7°F
Apr 10 48.5°F 49.6°F 47.8°F
Apr 11 48.4°F 49.5°F 47.9°F
Apr 12 47.7°F 49.8°F 47.7°F
Apr 13 48.6°F 49.4°F 47.8°F
Apr 14 48.9°F 49.9°F 48.1°F
Apr 15 48.8°F 49.6°F 48.1°F
Apr 16 48.6°F 49.4°F 48.2°F
Apr 17 49.3°F 49.4°F 48.2°F
Apr 18 49.2°F 49.2°F 48.2°F
Apr 19 49.4°F 49.2°F 48.4°F
Apr 20 49.7°F 49.6°F 48.6°F
Apr 21 49.9°F 49.7°F 48.8°F
Apr 22 50.1°F 49.7°F 48.9°F
Apr 23 50.1°F 50.2°F 48.9°F
Apr 24 50.2°F 50.2°F 49.0°F
Apr 25 50.2°F 50.3°F 49.1°F
Apr 26 50.3°F 50.2°F 49.1°F
Apr 27 50.3°F 51.4°F 49.1°F
Apr 28 50.2°F 50.5°F 49.1°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

January

February

March

April

May

June

July

August

September

October

November

December

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.5°F in Winter, 48.7°F in Spring, 58.2°F in Summer, and 57.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Caernarfon 51.1°F 19mi
Bangor 49.7°F 21mi
Conwy 50.5°F 33mi
Douglas 49.0°F 59mi
Aberystwyth 51.1°F 66mi

* current water temperature in this city

** straight line distance from Holyhead